gistfile1.php

/**
 * Return a machine-usable name for a client
 *
 * This aims to be usable for unix group/user names and shells
 *
 * This is inspired from the context sanitization stuff.
 */
function hosting_client_sanitize($title) {
  return strtolower(trim(preg_replace("/[!\W\.\-]/", "", $title)));
}